CNN is reporting that at least 1 American was among the wounded and that Americans are alleged to be among the attackers.

Before its Twitter account was suspended, Al-Shabaab issued a list of nine names it said were among the attackers. It said three were from the United States, two from Somalia and one each from Canada, Finland, Kenya and the United Kingdom.

A senior State Department official said that the United States was trying to determine whether any of the attackers are American. While they were still working to verify the claims, authorities said they were becoming more confident that American citizens may be involved.